html,
body {
    height: 100%;
}

body {
    display: -ms-flexbox;
    display: -webkit-box;
    display: flex;
    -ms-flex-align: center;
    -ms-flex-pack: center;
    -webkit-box-align: center;
    align-items: center;
    -webkit-box-pack: center;
    justify-content: center;
    padding-top: 40px;
    padding-bottom: 40px;
    background-image: url("../img/bookback.jpg");
    background-size: cover;
    background-repeat: no-repeat;
    /*background-color: #f5f5f5;*/
}

.form-signin {
    width: 100%;
    max-width: 350px;
    padding: 15px;
    margin: 0 auto;
}

.form-signin .checkbox {
    font-weight: 400;
}
/* 表单 */
.login-list{
    margin: 50px auto 0;
    height: 440px;
    width: 650px;
    border: 1px solid #d2d6dc;
    border-radius: 10px;
    transition: .3s;
    -webkit-transition: .3s;
    -ms-transition: .3s;
    -moz-transition: .3s;
    box-shadow: 0 0 12px rgba(0,0,0,.6);
    background: white;
}
.login-list:hover{
    box-shadow: 0 0 50px rgba(0,0,0,.4);
}

.form-signin .form-control {
    position: relative;
    box-sizing: border-box;
    height: auto;
    padding: 10px;
    font-size: 16px;
}

.form-signin .form-control:focus {
    z-index: 2;
}

.form-signin input[type="email"] {
    margin-bottom: -1px;
    border-bottom-right-radius: 0;
    border-bottom-left-radius: 0;
}

.form-signin input[type="password"] {
    margin-bottom: 10px;
}
